In a locality of 150 families one out of 5 families uses Samsung phone , one out of 10 families - Maths - Probability

Question

In a locality of 150 families one out of 5 families uses Samsung
phone , one out of 10 families uses nokia and 2 out of 15 families
uses Celkon find the probability of
1 Using Samsung Phone
2 Using Nokia Phone
3 Using Celkon Phone
4 No Phone

Ajanta Trivedi · Accepted Answer

one out of 5 families uses Samsung
phone,
the probability of using samsung phone = 1/5
the number of families which uses samsung phone = 150*1/5 = 30

one out of 10 families uses nokia,
the probability of using nokia phone = 1/10
the number of families which uses nokia phone = 150*1/10 = 15
families

2 out of 15 families uses celkon
the probability of using celkon phone = 2/15
the number of families which uses celkon phone = 150*(2/15) = 20
families

total number of families which uses phone = 30+15+20 =65
families
the number of families which uses no phone = 150-65
= 85 families

hope this helps you

In a locality of 150 families one out of 5 families uses Samsung phone , one out of 10 families uses nokia and 2 out of 15 families uses Celkon. find the probability of1 Using Samsung Phone2 Using Nokia Phone3 Using Celkon Phone4 No Phone

In a locality of 150 families one out of 5 families uses Samsung phone , one out of 10 families uses nokia and 2 out of 15 families uses Celkon. find the probability of
1 Using Samsung Phone
2 Using Nokia Phone
3 Using Celkon Phone
4 No Phone